Port Acls - Cisco IE-3000-8TC Software Configuration Manual

Understanding ACLs
An ACL contains an ordered list of access control entries (ACEs). Each ACE specifies permit or deny
and a set of conditions the packet must satisfy in order to match the ACE. The meaning of permit or deny
depends on the context in which the ACL is used.
The switch supports IP ACLs and Ethernet (MAC) ACLs:
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This switch also supports quality of service (QoS) classification ACLs. For more information, see the
"Classification Based on QoS ACLs" section on page
These sections contain this conceptual information:
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Port ACLs

Port ACLs are ACLs that are applied to Layer 2 interfaces on a switch. Port ACLs are supported only on
physical interfaces and not on EtherChannel interfaces and can be applied only on interfaces in the
inbound direction. These access lists are supported:
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The switch examines ACLs associated with all inbound features configured on a given interface and
permits or denies packet forwarding based on how the packet matches the entries in the ACL. In this
way, ACLs control access to a network or to part of a network.
ACLs to control access to a network when all workstations are in the same VLAN. ACLs applied at the
Layer 2 input would allow Host A to access the Human Resources network, but prevent Host B from
accessing the same network. Port ACLs can only be applied to Layer 2 interfaces in the inbound
direction.
Cisco IE 3000 Switch Software Configuration Guide
34-2
IP ACLs filter IPv4 traffic, including TCP, User Datagram Protocol (UDP), Internet Group
Management Protocol (IGMP), and Internet Control Message Protocol (ICMP).
Ethernet ACLs filter non-IP traffic.
Port ACLs, page 34-2
Handling Fragmented and Unfragmented Traffic, page 34-3
Standard IP access lists using source addresses
Extended IP access lists using source and destination addresses and optional protocol type
information
MAC extended access lists using source and destination MAC addresses and optional protocol type
information
Chapter 34 Configuring Network Security with ACLs
36-7.
Figure 34-1 is an example of using port
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